/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package libcore.java.util;
import java.util.Random;
public class RandomTest extends junit.framework.TestCase {
public void test_subclassing() throws Exception {
// http://b/2502231
// Ensure that Random's constructors call setSeed by emulating the active ingredient
// from the bug: the subclass' setSeed had a side-effect necessary for the correct
// functioning of next.
class MyRandom extends Random {
public String state;
public MyRandom() { super(); }
public MyRandom(long l) { super(l); }
@Override protected synchronized int next(int bits) { return state.length(); }
@Override public synchronized void setSeed(long seed) { state = Long.toString(seed); }
}
// Test the 0-argument constructor...
MyRandom r1 = new MyRandom();
r1.nextInt();
assertNotNull(r1.state);
// Test the 1-argument constructor...
MyRandom r2 = new MyRandom(123L);
r2.nextInt();
assertNotNull(r2.state);
}
}